Spekra Reliability Vector #10 • Zero-Exposure Schedule Verifier

Never Let Scheduled Background Workloads
Fail Silently.

Statically verify cron expressions, prevent unbuffered execution overlap, detect dead-man switch failures, and issue cryptographic SOC 2 CC7.2 compliance proof bundles in CI/CD in <500ms.

Test Schedule Simulator 60-Second Quickstart

< 500ms

Zero-Execution AST Parse Speed

0 Overlaps

Concurrency Mutex Guard

100% Offline

HMAC Key Validation

SOC 2 CC7.2

Cryptographic Evidence Seal

Interactive Simulation Engine

Cron Interval & Dead-Man Switch Auditor

Test real production failure modes: unbuffered overlaps, daylight savings drift, and silent exception suppression.

Engine: CronProof AST v1.0.0

Cron Expression & Timezone

Expression (5 or 6 fields)

Execution Timezone

Scheduled Task Source Code

// Loading...

Reliability Diagnostic

SCHEDULE HEALTH SCORE

65 / 100

D (POOR)

Schedule Invariants: Every 2 minutes

Projected Next Runs (UTC):

2026-10-20 23:42:00 UTC
2026-10-20 23:44:00 UTC
2026-10-20 23:46:00 UTC

Findings & Audit Observations

1-Minute Integration

Drop-in CI/CD Schedule Guard

Zero dependencies. Runs in under 500ms on your existing CI runner or local dev terminal.

# Audit entire repository for unbuffered cron overlaps and dead-man switches:

npx cronproof scan --min-score 85

# Generate SOC 2 CC7.2 compliance audit report in markdown:

npx cronproof report --soc2 --out SOC2_CC7.2_AUDIT.md

# .github/workflows/schedule-audit.yml

name: CronProof Schedule Guard
on: [push, pull_request]

jobs:
  audit-schedules:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - name: Statically Audit Cron & Dead-Man Switches
        run: npx cronproof check --min-score 90 --strict

// Drop-in dead-man switch wrapper in your application:

import { createHeartbeatGuard } from 'cronproof/runtime';

const guard = createHeartbeatGuard({
  name: 'stripe-invoice-sync',
  pingUrl: process.env.DEAD_MAN_PING_URL,
  timeoutMs: 60000
});

await guard.run(async () => {
  await syncInvoices();
});

Live Badge Studio

Display Real-Time Schedule Health

Embed cryptographic trust badges directly in your README, system status dashboard, or documentation.

Variant:

Theme:

SOC 2 CC7.2 Attestation

Audit-Ready Background Job Verification

Auditors evaluate whether batch processes execute within approved operating boundaries without silent drops. CronProof generates cryptographically sealed SHA-256 evidence certificates in seconds.

Straightforward Licensing

Predictable Pricing for Fast Teams

Zero telemetry. Offline HMAC tokens verified completely within your VPC.

Monthly

Annual (Save 20%)

Community

Open-source & hobbyists

✓ Basic AST scan & syntax validation
✓ CLI terminal summaries
✓ Up to 10 scheduled jobs
✓ Standard SVG trust badge

Starter

$99 / year

Growing SaaS products

✓ Everything in Community
✓ Unbuffered execution overlap guard
✓ Dead-man switch heartbeat auditor
✓ Up to 50 scheduled jobs
✓ HTML audit reports

Technical FAQ

Frequently asked questions about AST schedule auditing and dead-man switches.

Does CronProof execute my scheduled tasks during scanning? +

No. CronProof is 100% static. It parses Abstract Syntax Trees (AST) and configuration manifests (Kubernetes CronJobs, crontabs, Celery configs) without running application code or requiring database connections.

How does CronProof detect overlapping execution hazards? +

CronProof analyzes the trigger interval alongside the AST code body. If a job triggers frequently (e.g. sub-minute or sub-hourly) without acquiring a distributed mutex (such as Redis Redlock or database advisory locks), it flags an unbuffered execution overlap hazard.

What frameworks are currently discovered? +

CronProof discovers Node.js schedulers (node-cron, bree, agenda), Python frameworks (celery beat, apscheduler), standard Unix crontabs, and Kubernetes batch/v1 CronJob manifests.

How does offline licensing work? +

Licenses use HMAC-SHA256 tokens starting with cp_lic_.... The CLI validates expiration and tier signature entirely offline using embedded public keys without phone-home telemetry.

Never Let Scheduled Background Workloads Fail Silently.